Support mat



FIG. 1 is a perspective view of my support mat in accordance with myinvention;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof; and,

FIG. 4 is a side view thereof, all other side views being mirror imagesthereof.

The broken lines depict portions of the article that form no part of theclaimed design.

CLAIM The ornamental design for a support mat, as shown and describedherein.